Electric socket plug



Aug. 80, 1938.

M. s. GAGYLE ELECTRIC SOCKET PLUG Filed oct. 28, 188s .Merlin/,5f faggi WM/rn.

ATTOR N EY Y ableand effective in its purpose,

V:as

portions 6 and their curvatures are o! such de- Patented Aus. so. tess '1 v'unir-so srATEs PATENT l FFHCE ELECTRIC SOCKET PLUG Merlin S. Gagle, Middiesboro, Ky. Application October 28, 1933, Serlaihlo. 695,819

1 claim. (ci. 1134-343) v gree that parallel lines tangent to their peaks The invention relates to an electric socket plug and more especially to separable attachment plugs.

The primary object of the invention is the provision of a plug of this character, wherein the prongs constituting member of the plug are so distorted as to make a -positive connection with the female member and to frictionally hold these parts intertted with each other without any possibility of the diminishing of contact through long or hard usage of such plug, the male and female members being readily separable from each other.

A further object of the invention is the provision of a plug of this character which is exthoroughly reli-V strong, durable,

4tremely simple in construction,

and inexpensive to manufacture.

With these and other objects in view, the invention consistsin the features of construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in the accompanying drawing, which discloses the preferred embodiment 'of the invention, and pointed out in the claim hereunto appended.

In the accompanying drawing:

Figure l is an elevation of the male member of a separable attachment plug.

Figure 2 is an elevation partly in section of the male and female members of the plug interiitted with each other. f f

Figure 3 is a view si at right .angles thereto.

Similar reference characters indicate corresponding parts throughout the several views in the drawing. Y

Referring to the drawing in detail, A designates generally the plug member and B the socket member of a separable attachment plug. This socket member, in its body, is provided with the recesses 5 for the reception of the contact prongs t of the plug member A, and within these recesses are the fingers l to belengaged by said prongs lar to Figure 1 looking 6 and in this manner the members A and B are they connect with the plug member, but fromthe straight portions to their extremities, they are reversely curved, as indicated at 8, providing bight portions 9 and I0 vand terminal bight portions iormed by relatively outwardly directed terminals. The several bight portions extend equal distances onopposite sides of thel lines constituting extensions of the axes of the straight the contacts of the male minal bights of the prongs, as above described,

-requires a slight pressure for the insertion of the prongs in the recesses-when attaching the plug member to the socket member, since the effect is to slightly elongate the prongs, giving each not less than three points of contact within its respective recess of which at least one is with the contact finger and this without any lateral deflection of the straight portion i5 which, in the inserted position of the prong stands spaced from the contact finger and the opposite wall of the recess.

What is claimed is:

In a separable plug, a socket member having spaced parallel recesses iiared at their outer ends and provided with opposed straight walls, a contact finger permanently mounted ineach recess and disposed against one wall thereof, a plug member, and contact prongs carried by the plug member and guided into the recesses by the ared outer ends thereof, said prongs having straight portions where they connect with the plug member and being reversely curved from said straight portions to their extremities to provide atleast three succeedingA bight portions, thebight portions extending equal distances on opposite sides of the lines constituting extensions of the axesis unconnected with the socket member parallel lines tangent to the peaks of the curvatures are separated a greater distance than the thicknesses of the recesses as defined by the prong contacting faces ofthe iingers and the opposite walls of the recesses, so that said curvatures are spread upon insertion of the prongs in the lre-` cesses to give each at least a three point contact in its recess of which at least one point of contact is withiithe contact iinger, the straight portions oi the'prongs being 'so spaced relatively as to be out of contact with the walls of the recesses and contact fingers when positioned in said recesses.

MERLIN S. GAGLE. 

